I'm excited to announce the second Android Developer Challenge (ADC)! The first challenge was a huge success with over 1,700 entries that resulted in 50 excellent winners. With the recent release of Android 1.5, as well as the availability of devices in multiple markets around the world, I'm pleased to announce the second ADC.

We've expanded ADC 2 to involve a very important part of the Android community—the users who will be running these applications. Users of Android-powered devices with Android Market will be able to download a special Android judging application and use it to download and rank applications submitted to the Challenge. The results from this round will determine the top ranking applications in each of the 10 categories. These top applications will then be ranked by a combination of users and a panel of Google selected judges through a similar process as the first round to determine the final winners.

I've already seen a lot of great apps on Android and I look forward to seeing even more innovative and unexpected cool apps that will come out of this Challenge! For more details on ADC 2, please see the official site. Start your engines and good luck!